A method for preventing core thermal power from exceeding limit value in nuclear power plant

Abstract

The invention discloses a method for preventing thermal power of a reactor core from exceeding a limiting value in a nuclear power plant. The method comprises the following steps: acquiring a measured value of high pressure cylinder inlet pressure in a steam turbine, and performing proportional-integral calculation on the measured value of high pressure cylinder inlet pressure and a constant value of the high pressure cylinder inlet pressure in the steam turbine; and acting the proportional-integral calculation result and a constant steam flow value on a power control loop, and controlling the thermal power of the reactor core not to exceed the limiting value by controlling the opening of a high-pressure cylinder valve by virtue of a steam turbine adjustment system according to the proportional-integral calculation result and the constant steam flow value. For a long time, the problem that the thermal power of the reactor core exceeds the limiting value cannot be effectively solved, so that potential hazards of the reactor core easily occur under instantaneous conditions. The constant value of the high pressure cylinder inlet pressure and the constant steam flow value are reasonably set, so that the thermal power of the reactor core is effectively and automatically controlled without exceeding the limiting value by controlling the opening of the high-pressure cylinder valve by virtue of the steam turbine adjustment system according to any one constant value of the constant value of the high pressure cylinder inlet pressure and the constant steam flow value, and hazards of the reactor core and the nuclear safety problem caused by that the thermal power of the reactor core exceeds the limiting value are solved.

Description

technical field [0001] The invention relates to the key technical field of a pressurized water reactor nuclear power plant, in particular to a technology for controlling the power of a steam turbine in a pressurized water reactor nuclear power plant to prevent the thermal power of the core from exceeding the limit value. Background technique [0002] A nuclear power plant is a power plant that uses the energy released by nuclear fission (Nuclear Fission) or nuclear fusion (Nuclear Fusion) reactions to generate electricity. [0003] In my country's first nuclear power plant imported from abroad, the steam turbine power control system adopted a relatively advanced layered computer control system at that time, including the steam turbine control concept used by the advanced nuclear power plant of the French EDF Power Company for the first time by the British GEC-ALSTOM company - steam turbine high pressure Cylinder inlet pressure control mode, which is an important concept to en...

AI Technical Summary

Problems solved by technology

Since GRE cannot prevent the occurrence of nuclear island reactor overpower events, it mainly relies on the operator to manually adjust the thermal power according to the transient conditions. It is easy to cause serious core hazards and nuclear safety problems due to human error.

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